The Great Lakes Today: Pollution Quiz

What was a significant environmental improvement in Lake Erie by 1991?

• The lake's water turned red.

• The lake was completely drained.

• The last line was removed from The Lorax.

• The lake became flammable.

What was the focus of the first cleanup efforts under the Great Lakes Water Quality Agreement?

• Noise pollution

• Air pollution

• Point-source pollution

• Non-point-source pollution

Which chemical was banned from detergents to reduce pollution in the Great Lakes?

• Lead

• Mercury

• Phosphorus

• Sulfur

What is a major challenge in the Great Lakes today?

• Noise pollution

• Light pollution

• Non-point-source pollution

• Point-source pollution

What is one source of non-point-source pollution mentioned in the text?

• Sewage treatment plants

• Runoff from storms

• Discharge pipes

• Factory emissions

What toxic metal is released into the air when coal is burned?

• Cadmium

• Lead

• Arsenic

• Mercury

What is the retention time of water in Lake Superior?

• 100 years

• 50 years

• 170 years

• 200 years

What is the best way to deal with pollution according to the text?

• Cleaning up existing pollution

• Ignoring pollution

• Relocating polluted areas

• Preventing pollution